Improvement in tools for gr



1 s. ,MUNGER.

' Tools for Grappling Broken Drills, &c.i.n Oil-Wells.

No.155 ,200. Pate h ted Sepi.'22,1874.

(fittest-1v I UNITED STATES PATENT OFFICE.

JEROME S. MUNGER, OF BLAIRS CORNERS, ASSIGNOR OF ONE-HALF HIS RIGHT TOROBERT HERSE, OF BEAVER, PENNSYLVANIA.

IMPROVEMENT IN TOOLS FOR GRAPPLING BROKEN DRILLS, &c., IN OIL-WELLS.

Specification forming part of Letters Patent No. 155,200, datedSeptember 22, 1874; application filed July 28, 1874.

To all whom it may concern! Be it known that I, JEROME S. MUNGER, ofBlairs Corners, in the county of Clarion and State of Pennsylvania, haveinvented certain new and useful Improvements in Fishing- Tools forGetting Broken Drills, Links, or other Pieces of Working Tools whichBecome Detached from Oil and Artesian Wells; and the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, making a part of this specification, in whichFigure 1 represents an exterior view of my improved fishing-tool orgrapple. Fig.2 is a sectional view of the same, showing the interiorworking parts.

My invention consists in the combination of spring-nippers, workinginside of the toolstock, with a spring-hook pitman and anirregulargrooved plate, whereby the nippers may be liberated from thearticle seized when it cannot be raised by the tool in one position, andfurther trials made; and, if not finally successful in bringing up thebroken tools, the fishing-too] can be jarred loose and taken out andsaved, which is not the case with any fishing-tool that has yet come tomy knowledge; for it is a fact, which has been demonstrated at a cost ofhundreds of thousands of dollars to those who have bored artesian andoil wells, that the ordinary tools used for grappling and fishing outdrills, 800., often get hung with the thing grappled, and the wellabandoned, and tools lost beyond recovery.

My improved fishing-tool is made of best wrought-iron or steel, theoutside of the stock A being of such size as nearly to fill the internaldiameter of the tube used for easing v the well, yet to move perfectlyfree up and out of the bell a in the bottom of the stock A; then, bylifting the tool or stock, the nipper fastens itself upon the article,and, if it is sufficiently liberated, takes it out of the well; but, ifthe article cannot be jarred loose, so as to be extracted, the nippers Bcan be entirely released from it by the action of the hook spring-bar Dworking in the irregular-grooved plate E, and the entipe fishing-tooltaken out and saved for further use.

My improved fishing-tool (as it is technically termed) is provided witha collar, G, and screw F, by which it is attached to a jar-link,ordinarily used in boring artesian or oil wells, every part made strongand substantial, the grooved plate E, hooked bar D, and springnippers Ball being made and fitted to the opening H in the stock A, so that theycan be taken out and repaired, or other parts put in, so that a greatsaving is effected in the cost and wear of the tools, and a much greatersaving in not getting the fishing-tools hung in the well, so as not tobe obliged to abandon it or them.

For the want of a tool that could be jarred loose and liberated from itsgrasp of such articles as get permanently fast often in boring deep oilor artesian wells, many thousands of dollars have been expended annuallyto no purpose since the discovery of petroleum, as the grapples andfishing-tools ordinarily used often become fast with the drill-point,link, or whatever fished for, in which case the tools, well, and allhave to be abandoned after they have nearly or quite finished theboring.

What I claim as my invention is The combination of the spring-nippers B,working inside of the tool-stock A, with the spring hook-bar D and theirregular-grooved plate E, for liberating the said nippers,substantially in the manner as and for the purposes herein specified.

In testimony whereof I hereunto subscribe my name.

' JEROME S. MUN GER. Witnesses:

JOHN LORAI-I, GEO. MUNGER.

